The KIPS Transactions:PartB (정보처리학회논문지B)

Korea Information Processing Society (한국정보처리학회)
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An Image Contrast Enhancement Method Using Brightness Preseving on the Linear Approximation CDF

선형 추정 CDF에서 밝기 보존을 이용한 이미지 콘트라스트 향상 기법

  • 조화현 (한양대학교 대학원 전자/전기/제어계측공학과) ;
  • 최명렬 (한양대학교 전자/전기/제어계측공학과)
  • Published : 2004.12.01
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Abstract

In this paper, we have proposed an image contrast control method using brightness preserving on the FPD(Flat Panel Display). The proposed method can be easily applied to the FPD required real-time processing, since hardware complexity is greatly reduced using linear approximation method of CDF(Cumulative Density Function). For effective processing of the proposed algorithm, we have utilized the sample value of CDF and Barrel Shift. Visual test and standard deviation of their histogram have been introduced to evaluate the resultant output images of the pro-posed method and the original ones.

본 논문에서는 평판디스플레이 상에서 밝기 보존을 이용한 콘트라스트 향상 기법을 제안하였다. 제안한 방식은 실시간 처리를 위하여 선형추정방법을 적용하여 누적분포함수를 계산함으로써 하드웨어 복잡성을 감소시켰다. 본 논문에서는 제안한 알고리즘을 효과적으로 처리하기 위하여 누적분포함수의 샘플 값과 배럴쉬프트(Barrel Shift)를 사용하였다. 제안된 방식에 의한 처리 결과와 원 영상의 화질 평가를 위하여 시각적 검증과 히스토그램 편차를 도입하였다.

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